Photosynthetic performances of Quercus pannosa vary with altitude in the Hengduan Mountains, southwest China

doi:10.1016/j.foreco.2005.03.031

	Photosynthetic performances of Quercus pannosa vary with altitude in the Hengduan Mountains, southwest China
	Zhang, SB; Zhou, ZK; Hu, H; Xu, K ; Yan, N ; Li, SY
通讯作者	zhouzk@mail.kib.ac.cn
	2005-07-01
发表期刊	FOREST ECOLOGY AND MANAGEMENT
ISSN	0378-1127
卷号	212 期号:1-3 页码:291-301
摘要	Quercus pannosa Hand.-Mazz. is an evergreen sclerophyllous oak that is an important component of montane forests at altitudes between 2500 and 4300 m in the Hengduan Mountains. To understand photosynthetic adaptability of Q. pannosa to alpine environments, photosynthetic performances and leaf traits were investigated along altitudinal gradients (at altitudes of 3240, 3650 and 4170 m, respectively). Observed trends with increasing altitude were: (1) progressively lower carboxylation efficiency (CE), light-saturated photosynthesis (P-max), daily average photosynthetic rate (P-day), photosynthetic pigments, leaf N content per unit area, optimum photosynthetic temperature (T-opt) and (2) progressively higher leaf mass per unit area (LMA) and ratio of intercellular CO2 concentration (C-i/C-a). However, stomatal conductance (G(s)) and water use efficiency (WUE) remained relatively constant along the altitudinal gradient. Lower photosynthetic rates in Q. pannosa at higher altitudes would be explained by combination of different factors: reducing CE, lower leaf N content and photosynthetic pigments content, higher LMA and C-i/C-a. ln addition, Q. pannosa showed a significant mid-day depression in P., G,, E and WUE due to high water vapor pressure deficits (VPD) and high temperatures. ln general, the T-opt of Q. pannosa was significantly lower than those of Mediterranean oaks. This species could adapt well to low temperature, but high temperature, which indicated that cold-tolerance would be an important determinant of distribution of this oak in the Hengduan Mountains. (c) 2005 Elsevier B.V. All rights reserved.
关键词	Quercus Pannosa Leaf Trait Photosynthesis Low Temperature Distribution
学科领域	Forestry
DOI	10.1016/j.foreco.2005.03.031
收录类别	SCI
语种	英语
WOS记录号	WOS:000229876300026
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/3162
专题	中国科学院东亚植物多样性与生物地理学重点实验室
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Zhang, SB,Zhou, ZK,Hu, H,et al. Photosynthetic performances of Quercus pannosa vary with altitude in the Hengduan Mountains, southwest China[J]. FOREST ECOLOGY AND MANAGEMENT,2005,212(1-3):291-301.
APA	Zhang, SB,Zhou, ZK,Hu, H,Xu, K,Yan, N,&Li, SY.(2005).Photosynthetic performances of Quercus pannosa vary with altitude in the Hengduan Mountains, southwest China.FOREST ECOLOGY AND MANAGEMENT,212(1-3),291-301.
MLA	Zhang, SB,et al."Photosynthetic performances of Quercus pannosa vary with altitude in the Hengduan Mountains, southwest China".FOREST ECOLOGY AND MANAGEMENT 212.1-3(2005):291-301.

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